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Finding the Fourth Proportional to 1,698.44, 2,341.54 and 1,661.64

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Solution

The fourth proportional to 1,698.44, 2,341.54 and 1,661.64 is: 2,290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.44 : 2,341.54 = 1,661.64 : x
  2. Step 2: Convert to fraction form
    1,698.44/2,341.54 = 1,661.64/x
  3. Step 3: Cross multiply
    1,698.44x = 2,341.54 × 1,661.64
  4. Step 4: Simplify right side
    1,698.44x = 3,890,796.53
  5. Step 5: Solve for x
    x = 3,890,796.53/1,698.44
  6. Step 6: Final answer
    x = 2,290.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.